Abstract: An adapter device includes a telephone port, for coupling to a line connector of a telephone, a computer port, for coupling to a communication port of a computer terminal, and a line port, for coupling to a telephone line, which is linked to a telephone network. The device operates in a plurality of operational modes, including at least a first operational mode, in which the circuitry couples the telephone via the line port to the telephone line so as to enable a telephone call to be conducted over the telephone network using the telephone, while the circuitry conveys data regarding the call to the terminal via the computer port, and a second operational mode, in which the circuitry couples the telephone via the computer port to the computer terminal, so that the telephone operates as an audio input/output device of the terminal.